Product Overview

The SG Series Three-phase Air-immersed Transformer is a natural cooling indoor transformer designed for AC 50Hz~60Hz circuits up to 1000V. It provides reliable control power for machine tools, mechanical equipment, small power applications, work lighting, and signal lamps.

Main Features

Two Body Types Available: Exposed type for controlled environments and fence type with protective steel shell for added safety
Low Power Consumption: Designed for energy efficiency with minimal losses
Low Noise Operation: Quiet performance suitable for indoor installations
Fire Resistant: Air-immersed design eliminates oil, reducing fire hazards
Pollution Free: Environmentally friendly with no oil or hazardous materials
Enhanced Models: Capacity ≥80kVA includes cooling fans, ammeter, voltmeter, and wheels for easy mobility
Customizable: Input/output voltages, enclosure types, and connection configurations (Y/Δ) can be tailored to requirements

Technical Specifications

Parameter	Specification
Rated Voltage	≤ 1000V
Rated Capacity	0.15kVA ~ 300kVA
Input/Output Voltage	200V/120V, 380V/220V (customizable)
Rated Frequency	50Hz ~ 60Hz
Connection Type	Yyno (Y/Yo), Dd (Δ/Δ), Dy (Δ/Y)
Ambient Temperature	-5°C ~ +40°C
Altitude	≤ 2000m
Relative Humidity	< 95%
Cooling Method	Natural Air Cooling (AN)
Protection Class	Exposed / Fence Type

Technical and Application Notes

The SG transformer features an air-immersed (dry-type) design that provides efficient heat dissipation without the need for oil. This makes it ideal for indoor installations where fire safety and environmental concerns are paramount. The natural cooling system ensures reliable operation while minimizing maintenance requirements.

For installations requiring input current above 300A, special design adjustments are necessary. Please consult with our technical team for custom specifications.